Saviour
Hal Carver was a World War II veteran who was introduced into hit show Roswell during the second season in the episode "Summer of '47". Michael is assigned to talk to Hal Carver for history class and hears the story of the crash of the alien craft in 1947.
As the episode evolves along with the story, Michael imagines himself and his friends in the roles of Hal's tale, and we find out what really happened in the Summer of '47.